期刊
NEW JOURNAL OF CHEMISTRY
卷 45, 期 11, 页码 5258-5265出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nj05812b
关键词
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资金
- University Grants Commission, India [F1-17.1/2017-18/RGNF-2017-18-SC-WES-37660/(SA-III/Website)]
- Council of Scientific & Industrial Research, India [09/028 (1045)2018 EMR-I]
- CAS-V(UGC), the Department of Chemistry, University of Calcutta
The article introduces a ligand design strategy with flexible ethanol amine arms, successfully preparing a series of Ni(II)LnIII2 complexes, exploring their structure-property relationships, and discovering a novel Ni-II-Ln(III)-Ln(III) topology.
3d-4f coordination complexes derived from appropriately designed ligand backbones offer great perspectives to construct functional magnetic materials. Here we have reported a ligand design strategy by introducing flexible ethanol amine arms in a conventional salen type ligand by Schiff base and Mannich reaction and shown how this Schiff-Mannich combo ligand approach afforded a series of Ni(II)LnIII2 (Ln = Gd, Tb, Dy and Ho) complexes. We have reacted the ligand with Ni-II to generate a metalloligand and by means of secondary assembly of this metalloligand with Ln(III) salts, the above mentioned Ni(II)LnIII2 series have been realized. As far as our knowledge goes, this Ni-II-Ln(III)-Ln(III) topology has not been reported in the literature to date. In-depth structural analysis of the ligand and the complexes has been carried out and this structural understanding will enable us to correlate the structure-property relationship in a better way. Magnetic studies indicated that the Dy-III analogue exhibits the slow relaxation of magnetization behavior under 800 Oe external dc field with energy barrier 2.94 K.
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